W3 (written by William Perry in Emacs Lisp) is an extensible, advanced
World Wide Web browser that runs as part of GNU Emacs. It has the
ability to understand many protocols, including HTML, Telnet, WAIS,
SMTP, gopher, ftp, et al.
w3 is available via anonymous FTP from
ftp://ftp.xemacs.org/pub/xemacs/emacs-w3/.